Daikin VRV 5-S Series - 19.4 Determining Additional Refrigerant Amount

19 | Charging refrigerant
Installer and user reference guide
96
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02
19 Charging refrigerant
In this chapter
19.1 Precautions when charging refrigerant ................................................................................................................................. 96
19.2 About charging refrigerant..................................................................................................................................................... 97
19.3 About the refrigerant ............................................................................................................................................................. 97
19.4 To determine the additional refrigerant amount .................................................................................................................. 99
19.5 To charge refrigerant.............................................................................................................................................................. 100
19.6 Error codes when charging refrigerant .................................................................................................................................. 102
19.7 To fix the fluorinated greenhouse gases label ....................................................................................................................... 102
19.8 To check for refrigerant leaks after charging......................................................................................................................... 103
19.9 To insulate the refrigerant piping........................................................................................................................................... 103
19.1 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪ General safety precautions
▪ Preparation
WARNING
▪ Only use R32 as refrigerant. Other substances may cause explosions and
accidents.
▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 675. Do NOT vent these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.
NOTICE
If the power of some units is turned off, the charging procedure cannot be finished
properly.
NOTICE
Turn ON the power 6 hours before operation in order to have power running to the
crankcase heater and to protect the compressor.
NOTICE
If operation is performed within 12 minutes after the indoor and outdoor units are
powered on, the compressor will not operate before the communication is
established in a correct way between outdoor unit(s) and indoor units.
NOTICE
Before starting charging procedures, check if the 7‑segment display indication of the
outdoor unit A1P PCB is as normal (see "22.2.4To access mode 1 or 2"[4124]). If a
malfunction code is present, see "26.3 Solving problems based on error
codes"[4147].
NOTICE
Make sure all connected indoor units are recognised (setting [1‑10]).